Abstract: The apparatus of the invention includes a precooler (post heater) heat exchanger and a subcooler heat exchanger which are connected in fluid communication with the refrigerant input and output, respectively, of the condenser (evaporator) of a heat transfer system. A fluid, such as water, is forced through the subcooler heat exchanger and then through the precooler (post heater) heat exchanger to be in a heat exchanging relationship with the refrigerant flowing therethrough.The method of the invention includes the step of regulating the flow rate of the water flowing through the apparatus such that the refrigerant is precooled to approximately its saturated-vapor state and subcooled when the system is operating in a cooling mode and such that the refrigerant is post heated to at least a saturated-vapor state and subcooled when the system is operating in a heating mode.

Abstract: A sectional wall form system is disclosed for forming concrete walls or the like. Basically, the wall form system comprises a plurality of channel panels which are serially connected together in a side-by-side relationahip by means of a plurality of lock brackets. Each lock bracket comprises a substantially rectangular configuration dimensioned to closely fit between the side portions of the channel panels. A pair of L-shaped locking rods are welded to the underside of each of the lock brackets and extend from one edge thereof. A pair of locking apertures is located in the other edge of each of the lock brackets. During assembly, the channel panels are placed in a side-by-side relationship. An intermediate lock bracket is placed in a position substantially parallel to the side portion of an intermediate channel panel enabling the locking rod to engage into respective apertures in the side portion of the intermediate and the succeeding channel panel.